Not sure. You can edit Expirience rewards so by the time you are on normandy Sheppard is level 30 and with max squad points by changing XPReward= to anything you want. I usually use a x100 multipliers.

Also there is a way to change the max level for more squad points but i dont know how.

There is a way... i was looking through some of the files looking for the shield section to edit them and i saw this line

MaxLevel=30 ... i havnt messed around with it yet and none of my shepards have gotten to level 30 anyways so lol im really sorry but i cant remember which file it was.. but i can say it was close to the top of the page

FOUND IT! its in the BIOGame file... about half way down or close to half way down... but as i said i havnt messed with it so i dont know of the reaction... good or bad.